Maven Shade重叠类警告

问题描述

我在项目中使用commons-io并希望对其进行阴影处理。我遇到警告，似乎无法弄清：

[WARNING] commons-io-2.7.jar,murder-1.0-SNAPSHOT.jar define 180 overlapping classes and resources:
...

我发现这很奇怪，因为murder-1.0-SNAPSHOT.jar是我要构建的jar，其中应包含commons-io jar。

我这样定义commons-io依赖项：

<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.7</version>
    <scope>compile</scope>
</dependency>

（我以为我应该使用runtime范围，但后来我无法运行package，因为它抱怨找不到FileUtils）

这是我的阴影插件的配置：

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-shade-plugin</artifactId>
    <version>3.2.4</version>

    <executions>
        <execution>
            <phase>package</phase>
            <goals>
                <goal>shade</goal>
            </goals>
            <configuration>
                <artifactSet>
                    <includes>
                        <include>commons-io:commons-io</include>
                    </includes>
                </artifactSet>
                <filters>
                    <filter>
                        <artifact>*:*</artifact>
                        <excludes>
                            <exclude>meta-inf/MANIFEST.MF</exclude>
                            <exclude>meta-inf/*.SF</exclude>
                            <exclude>meta-inf/*.DSA</exclude>
                            <exclude>meta-inf/*.RSA</exclude>
                        </excludes>
                    </filter>
                </filters>
            </configuration>
        </execution>
    </executions>
</plugin>

如果我完全删除<filters>，只会收到以下警告：

commons-io-2.7.jar,murder-1.0-SNAPSHOT.jar define 1 overlapping resource
[WARNING]   - meta-inf/MANIFEST.MF

一切似乎仍然可以正常运行，但是我想在打包时摆脱此警告。

编辑：

如果我先运行mvn clean，则下一个mvn package不会产生这样的警告。随后的运行将再次引入警告。

解决方法

最后，这就是我最终得到的结果，它似乎有效并且不产生任何警告：

<properties>
    <!-- replace this with wherever you want your shaded dependencies to end up -->
    <shaded-dependencies>io.vapidlinus.shade</shaded-dependencies>
</properties>
....
<executions>
    <execution>
        <phase>package</phase>
        <goals>
            <goal>shade</goal>
        </goals>
        <configuration>
            <artifactSet>
                <includes>
                    <include>commons-io:commons-io</include>
                </includes>
            </artifactSet>
            <filters>
                <filter>
                    <artifact>*:*</artifact>
                    <excludes>
                        <exclude>module-info.class</exclude>
                        <exclude>META-INF/*.SF</exclude>
                        <exclude>META-INF/*.MF</exclude>
                        <exclude>META-INF/*.DSA</exclude>
                        <exclude>META-INF/*.RSA</exclude>
                        <exclude>META-INF/**</exclude>
                    </excludes>
                </filter>
            </filters>
            <relocations>
                <relocation>
                    <pattern>org.apache.commons.io</pattern>
                    <shadedPattern>${shaded-dependencies}.org.apache.commons.io</shadedPattern>
                </relocation>
            </relocations>
        </configuration>
    </execution>
</executions>